<ion-list>
    <ion-list-header>子组件的值</ion-list-header>
    <ion-item>
        <ion-label>fatherInput:{{fatherInput}}</ion-label>
    </ion-item>
    <ion-item>
        <ion-label>modelVal:{{modelVal}}</ion-label>
    </ion-item>
    <ion-item>
        <button ion-button outline (click)="changeInput()">改变Input</button>
        <button ion-button outline (click)="emitOutput()">改变Output</button>
        <button ion-button outline (click)="changeModel()">改变modelVal</button>
    </ion-item>
</ion-list>
